This is the best concise explanation of this topic that I've heard. Obviously, I need to start hanging out with smarter people.

The football analogy is pretty good, man. Better than I could explain it to people.

A longer bullet has to spin faster than a shorter bullet to maintain a stable flight profile. Since all three bullets (55gn, 62gn, and 77gn) are 5.556mm/.223" in diameter, heavier bullets are longer than lighter bullets. So, a 77gn bullet can spin at 1/7" and a 55 gn bullet can spin at 1/9" to maintain a stable flight profile. At longer ranges as bullet spin rate diminishes, it's rotational wobble (bullets angle of attack compared to it's spin axis) increases, reducing stable flight profile and increasing MOA (minute of angle) of flight profile.

Great way of explaining this stuff. My AR with a 1/7 twist scatters the lite 55gr round. It loves the 62gr round though, much tighter groups.

I have heard a lot of explanations of twist rate in my day and this I must say has been the MOST simplistic explanation I have heard yet. Too the extent that I had one of my 9 year old shooting students listen to this tonight and she completely understood and expanded on it.... Point being if you don't get it after this explanation, you NEVER will.......

@Regular_Guy_Training_LLC

9 жыл бұрын

Glimtech Arms im glad you dig it buddy.

1/8 makes em twists like a happy ballerina (sounds the most promising to me so far...)

@fireteammichael1777

3 жыл бұрын

1/8 is arguably the best

@googlesucks2296

2 жыл бұрын

Agreed. It’s the most versatile.

I just love how real this guy is! You had me busting up laughing while learning...... mad respect to you brother. Great video.

I recommended some of your videos to a friend of mine who is new to guns. I like the straight forward no bullshit approach.

A buddy of mine explained to me just a couple days ago that a bullet is considered "stabilized" when it is rotating through the air at 250,000-300,000 rpm, and this partly explains the different twist rates in barrels.

Damn dude! I actually learned something on this one. New sub!

Definitely 1:9 for the usual shooter. We all use 55gn stuff for training and ammo stock. Honestly though, doing some math with a stability calc + what others have posted online, the 1:8 will stabilize the 77gn just fine and still have some room for error. The 77gn round is the longest that will fit in an AR mag. What I don't understand is why so many companies make the 1:7 twist barrels.. They're everywhere. One thing that happens when you spin a bullet more than it needs to is that accuracy opens up because it's spinning faster and any imperfections in the bullet will open the group up (very slightly). What also happens is you get more spin drift. The bullet stays angled up at the angle it was shot at why flying down range and it starts drifting right as opposed to a properly stabilized bullet. 1:8 or 1:9. I do 1:8 because it will take any bullet that will fit in an AR mag.

@Regular_Guy_Training_LLC

9 жыл бұрын

joshv06 dude, im trying to keep this simple and general so the new guys can start on this more easily

Man thank you for always answering my of topic questions. You are da man. Follow you to the end buddy!

great video. straight to the point

Excellent, just perfect! I like your football analogy. For some reason that's when my mind wrapped all the way around what you were talking about.

I really did like the way you explained it. I just shot my very first pistol last week, and I just fired my very first AR-15 today. This video helped me a lot to know my ammo.

Thanks for explaining this to me. I knew it at once upon a time and forgot it. I also knew that if I wanted an explanation without the bullshit, that I had to locate you. You do an awesome job and screw those bastards that are hating.

Great video.. I finally understand the twist rate with recommended grain weight 😊

Great video as always! Thank you for the info and your time it's appreciated

This is so much easier to retain when somebody is telling it to me like I am a complete moron... good info bro

Ak keeps it simple always. Great explanation of the twist rate and bullet weights.

Thanks for the concise explanation and leaving out the extraneous.

Very well said video. The twist rate argument, for most people, is nit picky bullshit. Under 200 yards (what most people's AR's are setup for, and what most people would shoot cheap 55 grain ammo for), Federal XM193 groups as well as 2 MOA in my 1/7 rifle. That's pretty damn respectable. Past 300, things really open up. I believe this has lots to do with 55 grain rounds' bad ballistic coefficient, but I have no doubt that the twist rate exacerbates that, just how you described.

Fucking people up with knowledge. Simple and well put. #YouGoGirl

If anyone can't understand this, they don't speek english. Great video.

Thanks for the vid man, I never quite got it but this cleared it up for me, keep up the good work :)

Do you know if there have been actual spin measurements made of the bullet in flight vs twist rate? We know the rifling "affects" the projectile to create the spin but I doubt it actually produces that rate in flight. If it did the bullet would never get out of the barrel. Just wondering.

what barrel is best when shooting a variety of different grain bullets? I'm putting together my first ar but I want one that can shoot almost any kind of bullet.

@Master...deBater

6 жыл бұрын

Go with 1/8 for 55-77 gr bullets...but 1/7 if you like extremely heavy bullets 77+ gr.

Great video. I've got a 1/8 and a 1/9. Really happy I didn't go with the 1/7 since I only really shoot 55 and 62. Explains a lot! Love your videos even when you talk shit on the ACR ; ) still absolutely love shooting mine from the bench or prone.

i have a cuestion... here "switzerland" i use the 62 grains gp90 in 1-10 "standart" Twist rate... we know that our sig 550/551/552 can use any Kind of ammo, but not the AR rifle... so what Twist rate are the best for our ammo? thanks and very good explain...

@Master...deBater

6 жыл бұрын

62gr 223 bullets prefer 1/8 twist. 1/8 stabilizes 55-77 pretty well...anything heavier use 1/7.

Just the info I was looking for. Plain and simple, and in the language I understand! 😁

Good vid and thanks for putting in the time on them. I agree with the conclusions but not exactly in the same way. The twist rate needed to stabilize a bullet is more dependant on the length of the projectile than on the weight. For a typical lead & copper bullet it's not so much a factor. However, a 62 grain M855 bullet is much longer than an all lead 62 grain and therefore needs more twist to stabilize. All copper bullets (GMX, TSX) are long for their weight and need a faster twist. Spinning faster than needed will cause imperfections in the bullet to influence it's path and spread groups. That's why the AMU runs 1-8" barrels on their match rifles instead of 1-7". I hope this helps and doesn't confuse the issue.

I have several AR 15's with 1:9, 1:8 and 1:7. I shoot 55gr---77gr. I shoot whatever I feel like at the time. I just re-zero each scope to whatever ammo I decided to use at that time. I generally shoot 100 yards out to around 600 yards. Something I may shoot 55gr VMAX in 1:7 sometime in the 1:9. Sometimes I may shoot IMI razor core in the 1:7 1:8 or the 1:9. I have never had an issue. All are accurate! If I can take a coyote at 600 yards with any of them I'm happy. I shot a coyote a few days ago at 550 with a 55gr VMAX in an AR with a 1:7 twist. I have a night vision optic on an AR for hogs in my crop fields with a 1:9 and I use IMI 77gr razor core. All are accurate and absolutely deadly. I don't like it over think things and I don't listen to so called experts. I test it and find out what works for me. My advice is don't overthink it and make it complicated. I may be 60yo but I routinely take hogs out to 600 and only miss 1-10 shots or less. I have a 400acre farm and a terrible problem with hogs destroying my crops and hay field. I shoot alot and often. This is my experience with much trial and error and just my opinion.

I'm looking at picking up my first AK what would you suggest ? I was looking at the ras47and the c39v2

Nice job on this video.

so 12.5 inch barrel with 1:8 twist, i should still go with the 62 grain ideally? i it was thinking to get some heavier stuff for the shorter barrel, instead should I be comfortable stocking up on 55gr?

I was comfortable with the normal rounds listed but what about the all copper TSX bullets? Since they are longer than the lead counterparts 1 in 7 probably the way to go for most of them?

The Nerf ball analogy was brilliant.

Most of my barrels are 1/7 am i really losing a bunch of accuracy shooting 55gr or 62gr? Or does it not really make a huge difference?

77gr 5.56 out of a 16" barrel with a 1/8 twist. I was looking at the IMI 77gr razor core.

@billharper537

3 жыл бұрын

Will solve all your inaccuracy issues immediately

What do you recommend for a home defense SHTF rifle?

Thanks your definitely got it lol the 1/9 is honestly the best for accuracy 55 or the 62 grain plus barrel length. Helps. 👍

This channel needs to be more popular, literally the best most straight forward informative gun channel I’ve come across with none of the clickbait stupid fluff

Football analogy is by far best I've heard. Though the spiral aspect of a throw is basically exactly same concept. And 55gr stabilizes pretty darn good out of all the 1/7s I've had. But just giving you crap. Lol. Great channel subd

Great video as always man. I have to ask. Do you think sometime you could do a longevity review of a ddi stamped AK47/74?

@Regular_Guy_Training_LLC

9 жыл бұрын

I want to

Can a 1-9 from a 20 inch HBar (Bushmaster) handle out to 600 yards on a 18x30 target? Not looking of 1-3 moa just hitting the target is all.

Colt 16” barrels with a 1/7” twist, that is 2&1/4 twist before leaving the barrel how affective is at a long range target?

This is all info that I already knew, but I'm surprised how many "gun guys" don't understand this. As with most of my firearms I take a "middle of the road" approach with my ar15s. I shoot a ton of this cheap federal xm855 lc1 ammo. I pay around. 40 cents per round for it, so I can shoot a lot for my money. I like barrels in the 1/8 twist variety be cause it works well for the ammo I have 1000s of rds of and it will also work ok with anything else I'm likely to get my hands on in a SHTF situation. Great video, I really enjoy the content you put out there.

Good info.Especially for those who are new to the ar platform.Having been around ak47s and military surplus rifles most of my life just purchased my first ar15.It is a different animal.Do your! research before you buy.Informed decisions are always. best! Once again thanks!

I concur....the football analogy was spot on! Investing in an AR platform soon (H&K likely) and appreciated the info....Bravo good brotha!

Cleared up some questions I had, thanks.

It is ok to load green tip ammo 1:7 twist with barrel length of 11.5?

Thanks for helping me understand the twist rates

Great video brother. Thank you! Love your vids man.

Thank you, short and so I can research the facts and get on with my life.

Good analogy with the Nerf ball. Nice job man.

So what is your preferred barrel for an ar15? I was looking for CHF melonite treated barrels and found Daniel defense barrels but they are all 1 in 7 twist

@Regular_Guy_Training_LLC

9 жыл бұрын

The absolute vast majority of ar shooting I do is in a non dm role. So it's 55 at 1/9

Loved the F-bombs you threw in at just the right times!

@detoxlangley8863

4 жыл бұрын

Stop blocking the board

I got a AR15 556 with a 1:8 what would you recommend me to use at the range???

Like the hoodie. Also this video will be a good resource for new people.

Appreciate the education. Thanks for sharing!

Thanks so much man, that totally helps!!

Thanks, brother! I appreciate the info!

Amen brother. Grind hard, stay humble.

Great points simplest way explained I've heard

Thank you for clearly explaining.

Great to know time to find a 1/8 twist barrel.

Finally someone has explained the twist rate where everyone will know what a twist rate is

Subbed straight to the point and what I need to know

This question is more about ballistics than long-range accuracy, but does barrel length make any noticable difference in performance? I use xm193 for home defense and have been thinking about getting a 20" upper to get the best ballistic performance out of the round, but I'm not sure of it would make a difference.

@Regular_Guy_Training_LLC

9 жыл бұрын

Inside of a house, no

@mrrrrrrrrrrrrrrrrrk

9 жыл бұрын

***** Yeah, people have told me to look into rounds marketed as defensive loads, but for the price and quality, I think standard 55 grain stuff works just as well, at least out of a carbine or rifle length barrel (pistol.sbr length might be a different story). Thanks for the info!

Best explanaton. Ive seen in a while ,.keep it simple. Ill take 1/9 for everyday training,.. it'll go up to 69 gr easily,.. maybe if its a good bbl,(DD)...75 gr. The problem the military had with 62 gr ammo stabilizing was with 1/12 twist bbls I think or thought

Informative, and hilarious! Awesome!

Have you done a video on .308 and 7.62x51? I have received so much conflicting information on the internet and at gun shops. Like an AR barrel is stamped 5.56 you can also shoot .223. If your M1A is stamped .308 can you also shoot 7.62x51? Or is it vice versa? Let me know thanks man

@ScuffedEngineer

9 жыл бұрын

Dan Saracco 308 is the higher pressure round. 308 can shoot 7.62x51mm.

@modernwarriorsystems7347

9 жыл бұрын

Dan Saracco You can shoot either through your .308. 7.62x51 NATO is actually a slightly less hot round than .308 Winchester. You can interchange 308 and 7.62x51 going either way. It doesn't matter. You can even get away with shooting 5.56 through a .223, but I wouldn't recommend it. It is dangerous. Some rifles the headspace would be wrong and the neck would mash up against the throat and create unacceptable pressures. It just all depends on the rifle.

What grain should I use in drills easier to find 55gr but I run a 1/7 and use 77gr for defense

Sorry for being so late to the party. Just recently, I've heard it said that 1/7" IN LESS THAN 14.5" barrels will stabilize any weight bullet. Does anyone have good information on such a statement (distances, group sizes)? Never heard that before, and was wondering if anybody else had and knew more.

Fantastic explanation, thanks man!!

Good info. I learned something today.

If’s specifically the ratio of the length of the projectile compared to its width that determines the optimum rate of twist for stabilization. Example, if you created a 55 grain .224” caliber bullet with a tungsten core, and compared it side by side to a 55 grain FMJ, (with a lead core), bullet, the tungsten core bullet would be noticeably longer. Your 55 grain, tungsten core bullet would require a greater rate of twist to stabilize it at long ranges, even though its weight is the same. This is why this new M855a1 ammo, even though it has the exact same weight as the M855 bullets, its length is noticeable longer. (The actual projectile, not the loaded cartridge) Because the core of the M855a1 is lead free, to maintain the same weight as the M855, it has to be longer. This will cause it to yaw at longer distances and it’s effectiveness in penetration will not be as efficient.

"Anybody that says anything different is full of shit" 🤣😂😅😅😂😂😅 Love it!

What if you have a 308 rifle with a 1/9 barrel twist what grain will work best

Does this info apply to 16", 18", and 20" barrels alike?

@markrichardson1657

6 жыл бұрын

william629 twist rate stays the same no matter length of the barrel.

@JuiceOg1

5 жыл бұрын

Correct only difference really among those barrels are velocity and what your intending to use it for.

I'll stick with my 123gr 76.2x39 lol jkjk. The .223 is a good round for tumbling when it comes from a rifle length barrel. I learned a lot so thanks for the video.

Green tip 5.56 62 grain vs Remmington .223 55 grain. These are at the same price point. I can't get a definitive answer on what twist rate and/or optimal range. Edit: Let me add to that that the green tip 5.56 steel rod isn't perfectly center for each bullet, or so I've been told. At 100 - 150 yards my group on my 16" 1:8 twist almost exactly 1" tighter than the regular 55 grain fmj.

Which bullet weight would you recommend for 1.12 twist rate on my 270 win. For long distance shooting . Thx

@Master...deBater

6 жыл бұрын

Long distance shooting requires heavy for caliber bullets. I'd use Nosler 150gr Accubond L-R with a 591 BC www.nosler.com/accubond-long-range-bullet/

Loved it brother thank you for you input

So if im building a ar47 with a 16inch barrel and 1:10 twist rate which would be the best grain for it. Using it for hogs and deer 50 to 150yards

You explained it perfectly thank you.

Barrel length also comes into play here. The longer the barrel, the slower the twist necessary to stabilize longer heavier bullets. A 16" 1:9 barrel will not stabilize a 77gr bullet as well as a 24" 1:9 barrel. Same twist rate, but the longer barrel stabilizes the bullet better by having more twists before the bullet leaves the barrel. Additionally, spinning a bullet too slow causes the nose to wobble and this is what causes the inaccuracy. Spinning a bullet too fast causes two things, a loss in 'possible' velocity as the bullet is traveling in rifling of more overall length (more resistance to get to the same muzzle) and two, spinning the bullet so fast the centripetal force can cause the bullet to come apart in travel. Over-spinning the bullet rarely causes a degradation in accuracy as long as the bullet survives the forces. Many wildcat rounds over the years have been made with the specific purpose of over-stabilization to assist in using lighter bullets to above average distances. A lot of the initial 220 Swift and 22-250 wildcat guns were like this in the desire of that 1k yard prairie dog shot. The first time you see a 40gr Nosler BT at 4200FPS come apart in the air, you are like, WTF just happened? Bottom line for AR's, all three of these twists will stabilize all three of this bullet weights and everything in between. Any potential loss of accuracy based on twist rate will be nominal in comparison to the bullets drop and wind drift past 300 yards. Out of any 5.56 barrel with these three twists, a 77gr Sierra Match King bullet (the one in the Mk262 ammo) will be more accurate, period. I own 10.5" to 24" barreled AR's with twist rates of all three types. 77gr SMK wins out of all of them with factory and optionally made reloads of any type bullet weight for each gun. Please, test it for yourself.

@toddwebb8666

7 жыл бұрын

Isn't the twist rate just accelerating the bullet up to a certain centripetal force?

@3rdeyeulogynima566

5 жыл бұрын

What would you recommend in a 18" 1/8"?

Thanks. I don't own a rifle yet but I always wondered about what's twist rate, thanks!!

Thx, so sounds like the 1:8 barrel is preferred over the 1:7? I’m asking to confirm from your comments - you used “pretty good” as the best performance term for the 1:8 and “OK” as the best term for the 1:7. Doesn’t appear that the 1:7 gets there or do we need to be using heavier than 77 for 1:7?

This was good, thanks! Don’t know if you were trying to be funny but you had me laughing a few times haha thanks again

On target, thanks for the explanation.

Thank u so much. the best explanation on youtube

The faster the twist rate, (smaller 2nd number).the "faster" the twist and/or spin of projectile. Faster rate (like 1/7) typically stabilizes heavier grain weights, though projectile length also plays a role. But I agree with your take. 1/9 best for 55gr, 1/7 better for 77gr, though 62gr as well. While 1/8 does great for both mil rounds, 55gr and 62gr

is the 55 grain a pee shooter load I have a 1/9 barrel 16" so do you recommend the 62 or 5t

@Regular_Guy_Training_LLC

7 жыл бұрын

55gr has been killing people just fine for a while man. if you want a little bit more accuracy at distance then yeah you can go 62, but as far as lethality is concerned, 55 is just fine.

@freedomconcepts689

7 жыл бұрын

thanks man

Does barrel length play much of a role? Does this apply to 16" barrels better than say a pistol length 8.5 or 10.5 barrel?

@Regular_Guy_Training_LLC

5 жыл бұрын

As far as velocity it certainly does

77 grain bullets are quite expensive to be shooting paper. 1/9 is the twist rate i prefer since the 55 grain is cheaper and very common. Thanks for the vid :)

Watched this after your gas system video where a guy commented thanking you for not being profane and now I'm weak

I have ADHD could you please explain it again 😀😀😀😀 just kidding good shit though

Thanks for explaining this.

Is XM193 the best to stockpile in bulk for defensive purposes or should I be looking for something else?

@Regular_Guy_Training_LLC

8 жыл бұрын

+SpartanG062 that's the most effective 556 round against people

@SpartanG062

8 жыл бұрын

Are there any particular ammo manufacturers you recommend or does it not matter?

@Regular_Guy_Training_LLC

8 жыл бұрын

for xm193 I like pmc